7664443 has 4 divisors (see below), whose sum is σ = 7670520. Its totient is φ = 7658368.

The previous prime is 7664407. The next prime is 7664453. The reversal of 7664443 is 3444667.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7664443 is a prime.

It is a Duffinian number.

7664443 is a lucky number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7664399 and 7664408.

It is not an unprimeable number, because it can be changed into a prime (7664453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358 + ... + 3931.

It is an arithmetic number, because the mean of its divisors is an integer number (1917630).

Almost surely, 2^7664443 is an apocalyptic number.

7664443 is a deficient number, since it is larger than the sum of its proper divisors (6077).

7664443 is a wasteful number, since it uses less digits than its factorization.

7664443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6076.

The product of its digits is 48384, while the sum is 34.

The square root of 7664443 is about 2768.4730448390. The cubic root of 7664443 is about 197.1636576256.

The spelling of 7664443 in words is "seven million, six hundred sixty-four thousand, four hundred forty-three".